Movable index-cards.



P. GREINDL.

MOVABLE INDEX CARDS.

APPLICATION FILED APR.16,1914.

1,108,574, Patented Aug. 25, 1914 sTATlS lill@ Parnnr PAUL GREINDL, OF BRUSSELS, BELGIUM.

IVIOVABLE INDEX-CARDS.

Speccation of Application filed April 16,

Letters Eatent.

To (lll lwhom t may concern Be it known that I, PAUL GaniNDL, baron, a subject of the King of the Belgiens, and residingat Brussels, Belgium, have invented certain new and useful Improvements in Movable Index-Cards, of which the following is a specification.

The methods of classingl by means of movable index-cards are so practically advantageous, that .nearly all the publie and private administrations adopted the same a long time since. l'lfowever if an index-card is wrongly placed, no means are provided for detecting the same.

The object of my present invention is to provide a system of movable index-cards, enabling the cards which are not placed alphabetically to be detected instantly.

The invention is illustrated by way of example in the accompanying drawings, wherein- Figure l shows an index-eard provided with two alphabets, Fig. .2 shows an indexcard provided with three alphabets, Fig. 3 is a general view of a number of indexoards arranged as in practical use.

The invention consists in providingl indexcards of a particular form according to the first characters of which the principal words of the cards are composed. This result may be attained by dividingr one or more sides of each index-card in two equal parts (in the example illustrated in the accompanying drawings.A the upper end of each index-card is divided into two equal parts) and marking the alphabet on one or more lines. The

characters A of both alphabets are placed in the central part of the index-card and on the lower line, it the alphabets are arranged on several horizontal lines. rl`he `characters of the alphabet are placed into rectangles. If an index-card is to be prepared all the characters of the left hand portion will be cut away by means of scissors as far as but not including the character correspondingy to that with which the title ot the card index commences. In the righthand-portion'all the characters .as .tar as the second character of the title will be similarly cut away. Should the index-card indicate the word Berlin for instance, all the characters on the left as l'ar as the character B will be eut away, and on the rightall the characters as i'ar as the. character lil will be similarly cut away.

M'ln Figs. l and 2 the lines :formed ol dots and dashes indicate the manner olf cuttingr the card for the word i Berlin." Now if the index-card prepared in this way is wrt-,ugly placed, say before the index-card indicating Blef the character E of the right hand side will project from the-upper ends of the iinlex-cards and instantly show the error.

lf there is a great number olI index-cards. it may be. advantageous to add one, two or more alphabets, either on the same side ol" the index-card or on a lil'l'erent side. these alphabets beine1 marked on dill'erent. horizontal lines. The index-cards will then be similarly arranged with respect to the first three, tour, ete., elniraeters4 oit the titles. The same method may o'l course l; to numerals or any other signs.

Havingfully described my invention, what ll claim and desire lo secure by Letters ,latent is :m- El. in inlprtned indexward. romprisinif :i substantially rectangular card. the chai-aiI- ters of two alphabets marked in opposite direct-ions near the upper end of the card and intended to be eut away substantially as set forth.

2. An improved index-eardcomprising a substantially rectangular card. the Characters oli several alphabets marked en flillerent horizontal lines near one end et the card and intended to be eut away substaw tially as set forth.

In testimony whereof l allix my signature in presence of two witnesses.

PAUL GREIN DL.

lllitnesses LORD B. Reni-1n, Giras. Roi Nasnrrn.

ze. applied 

